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1 1/2" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 3/8" Shank Diameter, 3 Flutes, 2 3/4" OAL, (1.5" Diameter, 1-1/2), 52248, USA Made: Amazon.com: Industrial & Scientific
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Amazon.com: Chiloskit 5pcs M3-M8 Pilot Slotting Counterbore Mould End Mill Cutter Solid Slot Countersink End Mill Drill Bit : Industrial & Scientific
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750 3/4 Diameter Carbide Counterbore, 1/4 Pilot Drill Size (Drill and counterbore in 1 operation for woods, plastics, and non ferrous material) - ID: 6646-CB4
CLEVELAND 1/2 x 3/4 HSS STEP / COUNTERBORE DRILL BIT 131285 MORSE TAPER #3 - MB8888AZ2 - M & J Tooling LLC
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5-pc Woodworking Countersink Counterbore Drill Bit Set 3in1 for #6 8 10 12 16 Screws, M2 Pilot Drill Bits Adjustable Depth, 82-Degree Chamfer with Stop, 1/4” Hex Shank, Includes 2 Allen Wrenches - Amazon.com
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7/8" Counterbore, Carbide Tipped, 3 Flutes, 3/4" Shank Diameter, Straight Shank, 5 3/8" OAL, USA Made, (.875" Diameter), 59811: Amazon.com: Industrial & Scientific
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